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Dynadisc 14" Diameter The DynaDisc provides the ultimate core workout without compromising your safety. Take your fitness program to the next level. One of the best core stabilization devices on the market. Same benefits as a gymball but without the risk of falling off.
Perfect for seniors and chronic back sufferers to use in therapy, at home or even the office.Specifications: 14 inches in diameter. Unique beveled edge supports comfort to the hamstrings. Made of the same material as a gymball. Inflate with a traditional ball needle.